I'm surprised there weren't more 7s and 8s. I guess we all respond to different things and the voters didn't appreciate the strong graphic elements and repetition. Well done.
I really like the repetition of shape in the trees and the gap between branches.
A little more shadow detail (less contrast) would have worked better for me, but that's just one person's opinion...
This image really creates tension! I see that you have without a doubt chosen a different perspective. When I open the image the tree hits me smack in my face, and part of me wants to move it. Then there is a part of me that feels like I'm hiding behind the tree. Pretty good thinking.